CODEWITHSUNDEEP
pythonnumpy
jinglei
jinglei

Reputation: 3353

Python: "TypeError: list indices must be integers, not tuple"

I have a dataset read from a .csv file which is a 2d array.
Now I want to slice the dataset and get the first element of every list in it.

import numpy as np

rawData = []
with open(path) as file:
    lines = csv.reader(file)
    for line in lines:
        rawData.append(line)

dataSet = rawData[0:10] # as the whole dataset is too large, I get the first ten rows to test
np.array(dataSet)
labels = dataSet[:,0]

If I run:

print np.shape(dataSet)
>>>(10, 785)

I've referred How to slice a 2D Python Array. However I still got this error.

Upvotes: 2

Views: 5246

Answers (2)

Forge
Forge

Reputation: 6834

Syntax is wrong in the line: labels = dataSet[:,0].

In your code dataSet is a python list and you are trying to access its key by using a python tuple ,0; the comma defines a tuple in python. You should use integers as the error message suggests.

To solve this, convert dataSet to a numpy array like this: numpy.array(dataSet).

Upvotes: 1

jinglei
jinglei

Reputation: 3353

Thanks to @jonrsharpe . np.array(dataSet) just create a new numpy array but I didn't assign it to dataSet. It should be 

result = np.array(dataSet)

Upvotes: 1

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